<template>
  <div class="col-md-4">
    <form class="form-horizontal">
      <div class="form-group">
        <label>用户名</label>
        <input type="text" class="form-control" placeholder="用户名" v-model="name">
      </div>
      <div class="form-group">
        <label>评论内容</label>
        <textarea class="form-control" rows="6" placeholder="评论内容" v-model="content"></textarea>
      </div>
      <div class="form-group">
        <div class="col-sm-offset-2 col-sm-10">
          <button type="button" class="btn btn-default pull-right" @click="add">提交</button>
        </div>
      </div>
    </form>
  </div>
</template>

<script>
export default {
  props:{
    addComment:{
      type:Function,
      required:true
    }
  },
  data(){
   return{
     name:'',
     content:''
   }
  },
  methods:{
    add(){
      //1.检查输入的合法性
      const name = this.name.trim()
      const content =this.content.trim()
      if(!name||!content){
        alert('姓名或者内容不能为空')
        return
      }
      //2.根据输入的数据封装成一个comment对象
      const comment = {
        name,
        content
      }
      //3.添加到comments中
      this.addComment(comment)
      //4.清除输入
      this.name = ''
      this.content = ''
    }
  }
}
</script>

<style scoped>
  .reply {
    margin-top: 0px;
  }

  li {
    transition: .5s;
    overflow: hidden;
  }

  .handle {
    width: 40px;
    border: 1px solid #ccc;
    background: #fff;
    position: absolute;
    right: 10px;
    top: 1px;
    text-align: center;
  }

  .handle a {
    display: block;
    text-decoration: none;
  }

  .list-group-item .centence {
    padding: 0px 50px;
  }

  .user {
    font-size: 22px;
  }
</style>
